Re: [Xenomai-help] rtdm_mmap and rt_heap

[Jan Kiszka <jan.kiszka@domain.hid>]

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Alessio Igor Bogani wrote:
> Hi All,
> 
> Exist differences between RTDM's Memory mapped API
> (rtdm_mmap()/rtdm_munmap()) and Native's sharing memory API
> (rt_heap_*())? Which?

The RTDM API is intended to be used by portable drivers for all skins
(even for other RT-Linux extensions) while the native heaps are for
native skin applications. So, if you are planning to implement a driver
for some hardware or some communication protocol and you want to map
e.g. DMA buffers from kernel to user space, use the RTDM API. If you
want to set up shared memory between native applications (user-user,
user-kernel), the heaps are your mechanism of choice.

Jan


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